Tissue Self Assess Flashcards
(54 cards)
Define tissue.
A group of structurally and functionally similar cells from the same origin that work together to perform a specific function.
What is histology?
The branch of biology and medicine that studies the microscopic structure of tissues.
What is histopathology?
The microscopic examination of tissues to study the manifestations of disease.
Discuss the importance of histology in healthcare.
- Disease Diagnosis
- Guiding Treatment
- Monitoring Therapy
- Understanding Physiology
- Research and Drug Development
- Forensic Investigations
What do you understand by the term ‘germ layers’?
The 3 primary layers of cells formed during the early stages of embryonic development that give rise to all the tissues and organs of the body.
What are the three germ layers?
- Ectoderm – outermost layer
- Mesoderm – middle layer
- Endoderm – innermost layer
What are the four primary adult tissue types?
- Epithelial tissue
- Connective tissue
- Muscle tissue
- Nervous tissue
From which germ layer is epithelial tissue derived?
Ectoderm, Mesoderm, Endoderm
From which germ layer is connective tissue derived?
Mesoderm
From which germ layer is muscle tissue derived?
Mesoderm
From which germ layer is nervous tissue derived?
Ectoderm
What do tight junctions do?
Form a seal for barrier and polarity control.
What is the function of adherens junctions and desmosomes?
Provide mechanical stability, ideal for tissues under mechanical stress.
What do hemidesmosomes do?
Anchor cells to the extracellular matrix (ECM), important for tissue integrity.
What is the function of gap junctions?
Enable cell communication, essential in synchronized activity.
What junctions are found in the urinary bladder epithelium?
Tight junctions, desmosomes, and adherens junctions.
Which type of cellular junction is prominent in cardiac muscle cells?
Gap junction.
What type of cell junction is most prominent in the gastrointestinal (GI) tract?
Tight junctions.
Epithelial cell junctions that restrict extracellular movement of molecules are:
Tight junctions.
Epithelial cell junctions that maintain tissue integrity and strength are:
Desmosomes.
Epithelial cell junctions that allow the passage of small molecules between adjacent cells are:
Gap junctions.
How is epithelium classified based on the number of cell layers?
- Simple epithelium: Single layer
- Stratified epithelium: Multiple layers
- Pseudostratified epithelium: Appears multi-layered
What are the cell shapes in epithelial tissue?
- Squamous
- Cuboidal
- Columnar
- Transitional
Do epithelial tissues have polarity?
Yes, they exhibit polarity essential for directional secretion, absorption, and selective transport.
